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I recently picked up a 1993 Cheyenne with the TBI 305 motor, 5 speed manual trans, 4x4, and a 14 bolt rear end... It has a 3 inch body lift as well as 2 inch blocks under the rear leaf springs....the front suspension has been lifted as well.

When I'm going into first gear, I get a really bad shudder like I'm not working the clutch right....I don't believe thats the case though since the majority of vehicles I've driven have been manual.... I can hear loud noises comming from under the truck....almost like a poping noise. If it jerks hard enough, my transfer case will jump into neutral.....so I have to come to a stop and throw it back down into 2wd.

My 4 low and 4 high work, so I don't think its a problem with the transfer case....When I say if it jerks hard enough.....it literally throws me around in the truck. If I granny the clutch and take off slower then an 18 wheeler, I get a light shudder....My ECU isn't throwing any codes or anything like that....and once I'm moving and fully into 1st gear, I don't have any issues. In reverse, I get the same thing but it isn't nearly as bad.

What could cause this? I'm sure someone has come across this before....this is the first big truck that I've owned so I'm kinda new to the whole thing.... Please any help or advise would be great. Thanks

i couldnt tell you where to find the accept able thickness but right off the bat you will see that the heads of the flywheel bolts will be beat up, the torsion springs for the disc will be beat up and shiny, and if its been going on for a while the surface will be shitty looking.

my whole point in the first post was that the flaywheel has been machined to the point where its overall thickness is to thin.

if its doing what i think it may have passed damage down the line and beat the tcase guts up to the point that its jumping out from the shocking and shuttering, it may clear up when you figure out exactly whats going on, it maybe too late.

They are actually brand new. I just put new blocks on the back. That is the first thing that I thought of so I bought new blocks and hardware. Turned out one of the old blocks was cracked so it needed to be replaced anyways.

Let me know when you want to break it down and ill give you a hand dropping the transmission. Summit Racing sells flywheels for $72 for your 305. We can always drop by a junkyard and get a cheap one and get it machined. It would cost you a lot less then buying a new one.

The idea for checking the mounts is an excellent idea. Even my brothers '96 had trashed mounts when we got to it, and when we got them changed out, there was a noticeable difference in the smoothness of the shifts, but that would have also been the clutch, pressure plate, and master cylinder that we just dropped in.

EDIT: I told you if you post in here you would get a pretty damn quick answer!! FTW

Haha hey Matt. Today was much better then the other day wasn't it? I have to fix todays damage before anything though....

It seems like some water got into the motor....maybe a little too deep for the truck....We got pics and video of it that will be posted ASAP.

Quote:

Originally Posted by metalmatt47

WOO! those are my pics!

Let me know when you want to break it down and ill give you a hand dropping the transmission. Summit Racing sells flywheels for $72 for your 305. We can always drop by a junkyard and get a cheap one and get it machined. It would cost you a lot less then buying a new one.

The idea for checking the mounts is an excellent idea. Even my brothers '96 had trashed mounts when we got to it, and when we got them changed out, there was a noticeable difference in the smoothness of the shifts, but that would have also been the clutch, pressure plate, and master cylinder that we just dropped in.

EDIT: I told you if you post in here you would get a pretty damn quick answer!! FTW

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